Low Force is a set of waterfalls in the Tees Valley Further upstream is the High Force waterfall. Low Force is also the site of the Wynch Bridge completed in 1830. It is suggested that only one person at a time should cross the bridge as it may be unstable. (From Wikipedia the free encyclopedia.) Each Print is 16-12 Inches Perfect size ready for Framing £9.99 Plus Postage & Packing.